He was born on January 1, 1847 and died on May 21, 1929 in Rome. He was an Archaeologist, topographer, and authority on ancient Rome who discovered many antiquities at Rome, Tivoli, and Ostia and published a 1:1,000-scale map of classical, medieval, and modern Rome in Forma urbis Romae (1893-1901). At 20 he assisted in the excavation of Emperor Trajan’s harbor at Porto, and his description (1868) remains authoritative. Appointed director of excavations and professor of ancient topography at the University of Rome in 1878, he also lectured in the U.S. and England (1886-87). His major works include Ancient Rome in the Light of Modern Discoveries (1888), Storia degli scavi de Roman (4 vol., 1902-12; “History of the Excavation of Rome”), and Wanderings in the Roman Campagna (1909).
Reference: New Encylopedia Brittanica